Boats have relied on the wind to travel around the world for hundreds of years, but last year was the first time that a vessel powered only by the sun completed the full circumnavigation. And now the MS Turanor PlanetSolar is on another mission: measure how climate change is affecting the Gulf Stream.

The expedition team on the 102-foot boat, comprised of scientists from the University of Geneva, will be collecting phytoplankton samples from the ocean and aerosols from the air to understand how the Gulf Stream -- an ocean current in the Atlantic that moves water from the tropics to the Arctic -- is responding to climate change, according to The Guardian. Because the boat is powered by 5,554 square feet of solar panels, the scientists won't have to worry about any polluting substances that could distort the data.

Turanor, which docked in New York City on June 17, 2013, moves at an average speed of 5 knots (5.57 mph) and can carry up to 60 people, according to CNBC. The boat's recent trip across the Atlantic was the fastest ever made by a solar-powered vessel -- 2,867 miles in 22 days. For its research voyage, it will be traveling up the East Coast of the U.S. and then back to Iceland and Norway.

"With a usual boat you take care of the sea, the wind, the currents," d'Aboville told The Guardian. "Now you have to take care of the sun."